It seems that nowhere in the world is there such a well-formed kame landscape, on open agricultural land and nutrient-rich lime soils, as in the Valle region west of Billingen between Varnhem och Lerdala. A maze of gravel, sand and moraine formations provide the backdrop to hollows which often contain a small lake or a marsh.
 
When the inland ice disappeared, Stone-Age people settled on the dry grass hills, caught fish in the numerous lakes and hunted in the bountiful deciduous forests. Through the influence of humans, the land was transformed over the centuries into a small-scale agricultural landscape with hay fields, grazing pastures and meadows, interspersed with lakes and hardwood forests.
 
The area is of national interest and is considered unique in the world. It includes six easily-accessible nature reserves.